Swimming snorkel



FIG. 1 is a right rear perspective view of the design;

FIG. 2 is a left side elevational view of the design, the right side elevational view being a mirror image thereof;

FIG. 3 is a bottom plan view of the design;

FIG. 4 is a top plan view of the design;

FIG. 5 is a front elevational view of the design;

FIG. 6 is a rear elevational view of the design; and,

FIG. 7 is a left front perspective view of the design. 

The ornamental design for a swimming snorkel, as shown and described. 